Textured yarn with different shrinkage and excellent suede effect and method for preparing the same

ABSTRACT

The present invention relates to a textured yarn (ATY) with different shrinkage and excellent suede effect, wherein at least one or two kinds of two-component composite yarns (effect yarn) having a monofilament fineness of 0.001 to 0.3 denier after dividing or extracting an extraction component are twined around a thermoplastic multifilament yarn (core yarn), 2 to 350 loops per meter of the two-component composite yarn of at least 1.0§® in length are formed on the surface of the textured yarn, and more than 95% of the two-component composite yarn loops of at least 1.0§® in length has a length of 1.0 to 2.5§®. The present invention prepares the textured yarn with different shrinkage by air-texturing the two-component composite yarn (effect yarn) and the thermoplastic multifilament yarn (core yarn) in an air texturing nozzle under the condition that the overfeed ratio of effect yarn to core yarn is 1.2 to 4.0. The textured yarn with different shrinkage of the present invention exhibits an excellent suede effect since the monofilament dispersability of the two-component composite yarn is superior, the density of raised fibers is high and the length of the raised fibers is uniform in the production of woven or knitted fabrics.

TECHNICAL FIELD

The present invention relates to a textured yarn with differentshrinkage which is superior in the effect of exhibiting a naturalleather-like touch and appearance (hereinafter, ‘suede effect’) and canselectively exhibit the effect of mixing various colors in dyeing(hereinafter, ‘melange effect’), and a method for preparing the same.

Synthetic fibers with superior physical properties have been used asyarns for apparel for a long time along with natural fibers. But, thesynthetic fibers are problematic in that they have a cold touch and isnot soft.

As a method for giving a natural fiber-like soft touch to syntheticfibers, the development of ultra fine synthetic fibers having amonofilament fineness of less than 1.0 denier has been carried out.Since the ultra fine synthetic fibers have a touch and function ofhigher quality than natural fibers, are easily processed, are easy tohandle with, and is capable of mass production at low cost, so theirrange of use becomes wider and wider.

BACKGROUND ART

Typically, methods for preparing a ultra fine synthetic fiber include adirect spinning method and a conjugated spinning method.

In the direct spinning method, since a fiber is directly spun through aspinneret, it is difficult to produce a ultra fine fiber of less than0.1 denier, and a number of problems occur in a yarn finishing andweaving step.

In contrast, in the conjugated spinning method, a two-componentcomposite yarn is prepared by conjugated-spinning different polymerssuch as a polyester/polyamide composition or a polyester/copolymerpolyester, and thereafter monofilaments (hereinafter, ‘fibrils’) of afiber forming component are prepared by being separated and divided fromthe two-component composite yarn by a physical or chemical treatment ina post-processing process. Therefore, the method is advantageous in thatit is easy to produce a ultra fine fiber of less than 0.1 denier, thefiber is easily conjugated with other fibers and the yarn finishing andweaving processability are good since fibrils are separated and dividedin the post-processing process.

However, in case of solely using the two-component composite yarn, whichis prepared by the conjugated spinning method, in woven or knittedfabrics, the buffability, volume property, drape property and burstingstrength are reduced. Particularly, in case of conjugated spinning thepolyester/copolymerized polyester composition, because the copolymerizedpolyester is extracted by weight reduction, a space is generated betweenfabric weaves and thus significantly degrading the resulting fabrics involume property, drape property and bursting strength.

To solve the above problem occurred by solely using the ultra finesynthetic fiber or the two-component composite fiber, a method forconjugating the ultra fine synthetic fiber and other fibers has beenwidely studied.

As the prior art for conjugating a two-component composite fiber andother fibers, Korean Patent Laid-Open No. 1998-55564 and the same No.1999-24801 disclose methods, as shown in FIG. 2, in which atwo-component composite fiber (C) of an undrawn state is drawn andfalse-twisted, then is fed into an air texturing nozzle (14) at the sameoverfeed rate (approximately 1 to 5%) along with a high shrinkage yarn(D), and then they are simply tangled (air-interminglied) by an airpressure of 1 to 5 kgf/cm².

In the present invention, such a interminglied yarn with differentshrinkage is hereinafter defined as ‘ITY (interlaced yarn)’, which isprepared by simply interlacing a core yarn and an effect yarn in the airtexturing nozzle under the condition that the core yarn and the effectyarn has the same overfeed rate of less than 5% and an air pressure isless than 5 kgf/cm², and, as shown in FIG. 4, which consists of the coreyarn and the effect yarn simply interlaced at an irregular intervalalong the lengthwise direction of the yarn. Specifically, as shown inFIG. 4, the ITY has a structure consisting of a compacted portion (b)and a bulky portion (C) formed alternately along the lengthwisedirection of the yarn.

The interlaced yarn (ITY) with different shrinkage prepared by the abovemethod has an advantage that it shows an excellent bulkiness due to adifference in shrinkage between the bulky ultra fine fiber and the highshrinkage yarn. And the ITY shows excellent strength and drape propertydue to thick monofilaments of the high shrinkage yarn used as the coreyarn. However, in the above method, since an undrawn, two-componentcomposite yarn that is weak in physical property is solely drawn andfalse-twisted, the process stability is significantly reduced under acommon false twisting condition, and it is impossible to get a texturedyarn with excellent bulkiness.

For instance, in case of drawing and false-twisting a two-componentcomposite yarn having polyester as a fiber forming component andcopolymerized polyester as an extraction component, since the thermalstability of the copolymerized polyester used as the extractioncomponent decreases, it is inevitable to set a temperature lower than atypical heating temperature, and an enough number of false-twist(twist/unit length) cannot be given.

As the result, the prepared textured yarn with different shrinkage isgreatly lowered in bulkiness, that is, crimp ratio (CR %). The crimpratio is a representative physical property representing the bulkinessand quality of the yarn in the post-processing. Due to the lower crimpratio, the ultra fine fiber is not sufficiently raised on the surface ofthe yarn, thus failing in getting the fabrics of excellent quality.

In Japanese Patent Laid-Open No. H7-126951, a method is describedwherein a thermoplastic multifilament yarn (core yarn) and a lowshrinkage, two-component composite yarn (effect yarn) are respectivelyfed into an air texturing nozzle at the same overfeed rate(approximately 1 to 5%), and then are simply interlaced(air-interminglied) by an air pressure of 1 to 5 kgf/cm², therebypreparing a interminglied yarn (ITY) with different shrinkage.

However, the ITYs prepared by the conventional methods are different inlength simply because of the difference in thermal behavior propertybetween two yarns, so they cannot show a good suede effect in theproduction of woven or knitted fabrics since the dispersabilty offibrils is lowered though the bulkiness is expressed. More specifically,as shown in FIG. 4, the interminglied yarns with different shrinkage(ITYs) prepared in the conventional methods has the shape where fibrilsare simply compacted at a constant interval along the lengthwisedirection of the intermingled yarn.

As a result, the concentrated fibrils are not dispersed well afterproducing a woven or knitted fabric, the length of raised fibers ininterminglied (concentrated) portion are different from the length ofraised fibers in non-interminglied (unconcentrated) portion and densityof the raised fiber is irregular. By this, in the production of woven orknitted fabric, as shown in FIG. 6, raised fibers aggregate to partiallyexpose the bottom of the woven or knitted fabric, and a superior suedeeffect cannot be shown.

As another conventional method, a method is widely embodied wherein athermoplastic multifilament (core yarn) and, not a two-componentcomposite yarn, but an ordinary low shrinkage multifilament yarn (effectyarn), are fed into an air texturing nozzle at a different overfeed rate(approximately 5 to 50%), and then are air-textured by a high airpressure of 6 to 16 kgf/cm², thereby preparing a textured yarn withdifferent shrinkage.

In the present invention, such a textured yarn with different shrinkageis hereinafter defined as ‘ATY (air-textured yarn)’, which is preparedby air-texturing a core yarn and an effect yarn in the air texturingnozzle under the condition that the core yarn and the effect yarn has adifferent overfeed rate of 5 to 50% and an air pressure ranges from 6 to16 kgf/cm², and, as shown in FIG. 3, in which the effect yarn twinesaround the core yarn and loops (a) of the effect yarn are formed on thesurface of the textured yarn.

For the thusly prepared ATY, as shown in FIG. 3, although loops areformed on the surface of the textured yarn, because the effect yarnforming the loops is not a two-component composite yarn, namely, a ultrafine fiber, the raised fiber density is low and the fibril dispersion isnot occurred in the production of woven or knitted fabric, therebyfailing in exhibiting a suede effect.

Accordingly, the present invention has been made keeping in mind theabove problems occurring in the prior art, and an object of the presentinvention is to provide a textured yarn with different shrinkage (ATY)which can exhibit a superior touch and appearance in the production ofwoven or knitted fabric because it has a superior fibril dispersability,a high raised fiber density and a uniform raised fiber length after abuffing process.

Another object of the present invention is to provide a textured yarnwith different shrinkage which shows an excellent melange effect whenbeing dyed.

A further object of the present invention is to provide a method forpreparing a textured yarn with different shrinkage which shows anexcellent suede effect.

DISCLOSURE OF INVENTION

The present invention provides a textured yarn with different shrinkagewhich shows an excellent suede effect in the production of woven orknitted fabrics since it consists of a two-component composite yarn(effect yarn) and a thermoplastic multifilament yarn (core yarn) beingair-textured under a proper condition, the effect yarn being twinedaround the core yarn, and uniform loops of the two-component compositeyarn are formed on the surface of the textured yarn.

In order to accomplish the above objects, the present invention providesa method for preparing a textured yarn with different shrinkage byair-texturing an effect yarn and a core yarn, wherein at least one ortwo kinds of two-component composite yarn having a monofilament finenessof 0.001 to 0.3 denier after dividing or extracting an extractioncomponent is used as the effect yarn, a thermoplastic multifilament yarnis used as the core yarn, the overfeed ratio of effect yarn to core yarnis set to 1.2 to 4.0 and an air pressure is set to 6 to 16 kgf/cm².

The thusly prepared textured yarn (ATY) with different shrinkage ischaracterized in that; at least one or two kinds of two-componentcomposite yarn (effect yarn) having a monofilament fineness of 0.001 to0.3 denier after dividing or extracting an extraction component istwined around a thermoplastic multifilament yarn (core yarn), 2 to 350loops per meter of the two-component composite yarn of at least 1.0 mmin length are formed on the surface of the textured yarn, and more than95% of the two-component composite yarn loops of at least 1.0 mm inlength have a length of 1.0 to 2.5 mm.

Hereinafter, the present invention will be described in detail withreference to the accompanying drawings.

In the present invention, as shown in FIG. 1, at least one or two kindsof two-component composite yarn having a monofilament fineness of 0.001to 0.3 denier after or dividing or extracting an extraction component isused as an effect yarn (A) and a thermoplastic multifilament yarn isused as a core yarn (B), the effect yarn and the core yarn arerespectively fed into an air texturing nozzle 3 through a first feedroller 1 and a second feed roller 2 so that the overfeed ratio of effectyarn to core yarn is ranged between 1.2 and 4.0, and then they areair-textured by an air pressure of 6 to 16 kgf/cm², thereby preparingfor a texture yarn with different shrinkage.

It is more preferable that the core yarn (B) is smeared with moisture bya water supply device 4 prior to being fed into the air texturing nozzle3.

The overfeed rate of the effect yarn is set by a difference in linearvelocity between the first feed roller 1 and the third feed roller 5,and the overfeed rate of the core yarn is set by a difference in linearvelocity between the second feed roller 2 and the third feed roller 5.

The textured yarn with difference shrinkage textured in the airtexturing nozzle 3 is heat-treated in a hollow heater 6 and thereafteris wound around a take-up roller 8.

If the monofilament fineness of the thermoplastic multifilament yarn(core yarn) is lower than 1 denier, the drape property of woven orknitted fabrics is reduced.

If the monofilament fineness of the thermoplastic multifilament yarn(core yarn) is exceedingly higher than 8 deniers, the yarnprocessibility is reduced and the repulsive elasticity is significantlyincreased, thus resulting in poor sewing processibility and degradingthe quality of fabrics. Therefore, the monofilament fineness of thethermoplastic multifilament yarn (core yarn) is preferably 1 to 8denier.

Additionally, if the shrinkage rate at boiling water of thethermoplastic multifilament yarn (core yarn) is lower than 5%, adifference in thermal shrinkage rate between the core and effect yarnsis small and therefore the bulkiness and compactness are reduced, thusmaking it difficult to get the resulting fabrics of excellent touch andappearance of fabrics. If exceedingly higher than 50%, wrinkles areformed on the fabrics due to an excessive shrinkage and the weavesbecomes excessively compact, thus hardening the fabrics and making thelength of raised fibers uneven.

Therefore, the shrinkage rate at boiling water of the thermoplasticmultifilament yarn (core yarn) is preferably 5 to 50%. This is becausethe difference in thermal shrinkage rate between the core and effectyarns is related to the bulkiness and compactness of the resultingfabrics.

If the elongation of the thermoplastic multifilament yarn (core yarn) islower than 25%, the yarn processability and the yarn finishing propertymay be lowered. If exceedingly higher than 45%, the drape property ofthe fabric may be reduced. Thus, the elongation of the thermoplasticmultifilament yarn (core yarn) is preferably 25 to 45%.

To produce such a thermoplastic high shrinkage multifilament yarn (coreyarn), a method is preferable wherein polyester polymer is copolymerizedwith the third component. The third component includes dicarboxyl acidssuch as sebacic acid, phthalic acid, isophthalic acid, etc., glycolssuch as diethylene glycol, polyethylene glycol, neopentyl glycol, etc,bisphenol A, bisphenol sulfon and the like.

Considering the exhibition of the high shrinkage properties, the contentof copolymer in the third component is preferably higher than 3 mol %.If the copolymer content is too high, the spinning properties aredegraded and the fabrics become poor due to excessive shrinkage. Thus,the copolymer content of lower than 20 mol % is most preferable.

The melting point temperature on a DSC changes according to the contentof copolymer in the third component. If the melting point temperature ofthe high shrinkage yarn (core yarn) of the present invention is lowerthan 220° C., the process stability may be poor due to the thermalinstability. If exceedingly higher than 240° C., the thermal shrinkagerate may be lowered. Therefore, the melting point temperature of thehigh shrinkage yarn (core yarn) is more preferably 220 to 240° C. underscanning rate of 20° C./min.

Meanwhile, the two-component composite yarn (effect yarn) consists of afiber forming component and an extraction component or consists of atleast two kinds of fiber forming components with different dyeingproperties, and therefore the monofilament fineness after dividing orextracting the extraction component is 0.001 to 0.3 denier. The fiberforming component and the extraction component can be conjugated into asea-island type or a division type. The two-component composite yarn ofthe present invention includes all common composite fibers consisting ofa fiber forming component and an extraction component.

In addition, in the present invention, in order to obtain a melangeeffect in a dyeing process, (i) a two-component composite yarn is usedas the effect yarn, which consists of at least two kinds of fiberforming components with different dyeing properties; or (ii) at leasttwo kinds of two-component composite yarns are simultaneously used, eachconsisting of a fiber forming component and an extraction component, thefiber forming component having different dyeing properties from eachother.

More specifically, (i) a two-component composite yarn is used as theeffect yarn, which consists of a fiber forming component of polyesterand a fiber forming component of polyamide each having different dyeingproperties from each other and being conjugated side by side; or (ii) atwo component composite yarn consisting of a polyester fiber formingcomponent and an extraction component and a two-component composite yarnconsisting of a polyamide fiber forming component and an extractioncomponent are simultaneously used as the effect yarn.

If the monofilament fineness of the fiber forming component afterdividing or extracting the extraction component is exceedingly higherthan 0.3 denier, it fails to get a suede fabric with excellent touch. Ifthe monofilament fineness is lower than 0.001 denier, the yarnprocessibility, lightfastness and washfastness are reduced though thetouch becomes superior.

The shrinkage rate at boiling water of the two-component composite yarn(effect yarn) is preferably lower than 15%. If the shrinkage rate atboiling water is exceedingly higher than 15%, a difference in shrinkagerate between the effect and core yarns becomes smaller and therefore thebulkiness and compactness of the fabrics are reduced, thus degrading thequality of the fabrics.

Additionally, if the elongation of the two-component composite yarn(effect yarn) is lower than 23%, the yarn processibility and the yarnfinishing properties are reduced. If the elongation is exceedinglyhigher than 45%, the toughness is increased and therefore thebuffability is reduced and the evenness of raised fibers becomes poor.Thus, the elongation of the two-component composite yarn (effect yarn)is more preferably 23 to 45%.

The fiber forming component includes polyester resin, polybutyleneterephthalate resin, polyamide resin and the like, and an additive suchas carbon black may be added to the resin. The extraction componentincludes copolymerized polyester that is copolymerized with isophthalateand/or polyalkylene glycol.

As the two-component composite yarn, a yarn prepared by the spin directdraw process, a drawn yarn that is prepared by drawing an undrawn yarnand a false-twisted yarn that is prepared by false-twisting a drawn yarnare all included. In addition, the two-component composite yarn may be athick-and-thin yarn that is prepared by non-uniformly drawing an undrawnyarn.

FIG. 1 is one example of an apparatus for producing a textured yarn withdifferent shrinkage according to the present invention. An effect yarn(A) and a core yarn (B) are respectively fed into feed rollers 1 and 2with different overfeed rate, and the effect yarn (A) and the core yarn(B) passing over the feed rollers are air-textured in an air texturingnozzle.

The reason why the core and effect yarns are fed into different feedrollers is to position the core yarn (B) at the center of the texturedyarn and make the effect yarn (A) floating on the surface of thetextured yarn in loop (a) shape as shown in FIG. 3 by making theoverfeed rate of the effect and core yarns different.

At this time, the overfeed rate of the effect yarn is set to 10 to 60%and the overfeed rate of the core yarn is set to 5 to 55%. If theoverfeed rate of the effect yarn is too low, loops are not formed on thesurface of the textured yarn and therefore, as in the conventional art,the effect and core yarns simply have an air textured shape, therebyreducing the quality when applied to woven or knitted fabrics. If theoverfeed rate of the core yarn is too high, the yarn finishingprocessability may be reduced and the weavability may be reduced due toa large amount of long loops on the surface of the textured yarn.

The overfeed rate of the effect and core yarns is determined by therotary linear velocity ratio of the first and second feed rollers 1 and2 to the third feed roller 5. Namely, the overfeed rate of the effectand core yarns exceeding 0% means that the rotary linear velocity of thefirst and second feed rollers 1 and 2 is higher than that of the thirdfeed roller 5.

At this time, the rotary linear velocity of the first and second rollers1 and 2 is preferably set to 200 to 600 m/min. If the rotary linearvelocity is exceedingly higher than 600 m/min, the length of time wherethe effect and core yarns are touched with air during air texturingbecomes smaller, thereby making the loop shape poor and degrading theyarn finishing properties due to an increase in tension caused byhigh-speed traveling. Therefore, the lower the rotary linear velocity,the better the loops of uniform density are formed on the textured yarnwith different shrinkage. But, if too low, the productivity isdecreased.

Prior to feeding the core yarn into the air texturing nozzle 3, morespecifically, a water supply device 4 located between the second feedroller 2 and the air texturing nozzle 3 supplies a sufficient quantityof water to the core yarn. At this time, it is more preferable to usethe water which is deionized and does not contain bivalent inorganicsalt such as bivalent calcium, bivalent magnesium, etc.

At this time, if the overfeed ratio of effect yarn/core yarn overfeedrate is lower than 1.2, the core yarn as well as the effect yarn riseson the surface as loops to thus make the touch poor. If the overfeedratio is higher than 4.0, there is a risk that the loops on the surfaceof the textured yarn may be non-uniform. Thus, the overfeed ratio ofeffect yarn/core yarn is preferably set to 1.2 to 4.0.

Meanwhile, the air pressure by which the core and effect yarns areair-textured is set to 6 to 16 kgf/cm². If the air pressure is lowerthan 6 kgf/cm², the loops (a) of the two-component composite yarn(effect yarn) are not formed on the surface of the textured yarn (ATY)with different shrinkage as shown in FIG. 3, but the effect and coreyarns simply have the shape of being non-uniformly textured along thelengthwise direction of the textured yarn with different shrinkage,thereby decreasing a suede effect in the production of woven or knittedfabrics as shown in FIG. 4. If the air pressure is higher than 16kgf/cm², the effect and core yarns are damaged by an excessive airpressure, thereby degrading the physical properties of the textured yarn(ATY) with different shrinkage.

If the weight ratio of the two-component composite yarn used as theeffect yarn to the thermoplastic multifilament yarn used as the coreyarn is lower than 0.8, the ratio of the thermoplastic multifilamentyarn (core yarn) becomes higher, thereby increasing the possibility ofthe core yarn rising as raised fibers. If the weight ratio is higherthan 6.0, the overall shrink force of the core yarn is reduced, therebymaking the bulkiness poor. Therefore, the weight ratio of effectyarn/core yarn is more preferably 0.8 to 6.0.

Next, the textured yarn with different shrinkage that is air-textured asseen from above is heat-treated in a hollow heater 6 and then is wound.In the above heat treatment, the overfeed rate is set to 0 to −8% andthe temperature is set to 130 to 210° C.

In the above heat treatment, the overfeed rate is determined by therotary linear velocity ratio of the third feed roller 5 to the fourthfeed roller 7. Namely, the overfeed rate of a minus value lower than 0%during the heat treatment means that the rotary linear velocity ratio ofthe fourth feed roller 7 is higher than that of the third feed roller 5.

The loops on the textured yarn air-textured in the air texturing nozzle3 are thermally and physically in an unstable state, they need to bestabled. If the heat treatment temperature is lower than 130° C., theyarn is not sufficiently heat-treated and therefore the loops arechanged during a dyeing treatment, thus reducing the quality of thefabrics. If the heat treatment temperature is higher than 210° C., thehardness is increased due to excessive heat treatment, thus failing toobtain the fabrics of soft touch.

Further, in the heat treatment, if the overfeed rate is lower than −8%,the tension is increased and therefore the loops formed during airtexturing are lost. This reduces the bulkiness, increases the glossinessand increases oriented crystallization, thereby making the dyeingproperties poor. Moreover, in the heat treatment, if the overfeed rateis higher than 0%, the yarn traveling properties are reduced due to alow tension, yarn cutting is increased because the yarns are touched tothe surface of the hollow heater, and quality problems such as scorchingis occurred.

The thusly heat-treated textured yarn with different shrinkage is woundunder the condition that the overfeed rate ranges from −2% to −12%. Ifthe overfeed rate is higher than −2%, the hardness of the yarns woundaround a paper tube is lowered and the compactness of the yarns isweakened, thereby causing the yarn layers to be collapsed when beingwoven at a high speed. On the other hand, if the overfeed rate is lowerthan −12%, the hardness of the yarns wound around the paper tube isincreased, the wound state becomes poor and the compactness of the yarnsis strengthened, thereby reducing the yarn separating properties in aweaving process.

In the above winding process, the overfeed rate is determined by therotary linear velocity of the third feed roller 5 and take-up roller 8.Namely, the overfeed rate of a minus value lower than 0% during thewinding means that the rotary linear velocity of the take-up roller 8 ishigher than that of the third feed roller 5.

The thusly prepared textured yarn (ATY) with different shrinkageaccording to the present invention has a structure that at least one ortwo kinds of two-component composite yarn (effect yarn), consists of afiber forming component and an extraction component or consists of atleast two kinds of fiber forming components, having a monofilamentfineness of 0.001 to 0.3 denier after dividing or extracting theextraction component is twined around a thermoplastic multifilament yarn(core yarn), 2 to 350 loops per meter of the two-component compositeyarn of at least 1.0 mm in length are formed on the surface of thetextured yarn, and more than 95% of the two-component composite yarnloops of at least 1.0 mm in length has a length of 1.0 to 2.5 mm.

In case that the total fineness of the textured yarn (ATY) withdifferent shrinkage is lower than 100 denier, it is more preferable that2 to 50 loops of the two-component composite yarn are formed per meter.

Specifically, the textured yarn (ATY) with different shrinkage consistsof a thermoplastic multifilament yarn as a core portion and atwo-component composite yarn as an effect portion. At the center of thetextured yarn (ATY) with different shrinkage, relatively morethermoplastic multifilament yarns are distributed and, at an outer partthereof, relatively more two-component composite yarn are distributed asa large quantity of loops. This leads to an excellent bulkiness and,when adapted to the fabrics, a large quantity of uniform fibrils can becompletely dispersed after weight reduction and extraction. As a result,in the production of woven or knitted fabrics, a suede effect ofexcellent touch and compact structure is expressed.

For the conventional interlaced yarns (ITY) with different shrinkage asshown in FIG. 4, although it is possible to acquire the fabrics withbulkiness due to a difference in yarn length caused by the difference inthermal shrinkage between the core yarn and the effect yarn, thedivision and opening of fibrils are not properly achieved after weightreduction and extraction and therefore the raised fibers are aggregated,thus failing to acquire the fabrics of fine touch and making theappearance poor.

In order to solve such a problem, however, the present inventionprepares a suede-like woven or knitted fabric having a superior touchwhich maximizes the difference in bulkiness between a core yarn and aneffect yarn when weaving the woven or knitted fabric and improves thedensity and evenness of raised fibers by not simply mixing a highshrinkage yarn and a low shrinkage two-component composite yarn, butpositively projecting the two-component composite yarn from the surfaceof a textured yarn (ATY) with different shrinkage in loop shape.

The textured yarn (ATY) with different shrinkage of the presentinvention having a large quantity of loops may be deteriorated inprocessibility by the loops when being adapted to woven or knittedfabrics. In order to obtain the processibility and excellent quality,the loop length and number are very important.

The textured yarn (ATY) with different shrinkage of the presentinvention has 2 to 350 loops per meter of the two-component compositeyarn of at least 1.0mm in length. If the loop number is lower than twoper meter, it is impossible to obtain a high quality due to a decreasein bulkiness. If the loop number is higher than 350 per meter, theprocessibility and weavability become poor due to a large friction forceduring yarn traveling.

Additionally, in order to obtain good processibility and weavability andobtain the fabrics with uniform raised fibers, the loop length is alsoimportant. At least 95% of the loops of 1.0 mm in length formed on thetextured yarn (ATY) with different shrinkage of the present inventionhave a length of 1.0 to 2.5 mm. If there are a lot of loops higher than2.5 mm in length, the friction force is increased to thus reduce theprocessibility. Also, after being adapted to woven or knitted fabrics,the length of the raised fibers becomes non-uniform, thus failing toobtain the fabrics of superior quality.

Further, the textured yarn (ATY) of the present invention has a strengthof 1.5 to 3.0 g per denier and an evenness (U %) of 0.5 to 1.0.Moreover, the strength of the textured yarn (ATY) with differentshrinkage after dividing or extracting the extraction component isincreased by 5 to 30% with respect to the strength prior to dividing orextracting then extraction component and the number of loops on thesurface of the textured yarn (ATY) with different shrinkage is increased8 to 170 times.

The above-described textured yarn (ATY) with different shrinkage of thepresent invention is used as a warp and/or weft and is woven or knittedaccording to an ordinary method into a woven fabric, warp knit fabric orcircular knit fabric (hereinafter, referred to as ‘woven or knittedfabric’). Then, the woven or knitted fabric is heat-treated to thusexhibit a shrinkage difference, the fibrils are divided through alkaliweight reduction, raised fibers are formed through a process such asfiber raising or buffing, and then a final product is produced bydyeing, chemical treatment and thermalsetting.

In case that the textured yarn (ATY) with different shrinkage of theinvention is used in fabrics, it is possible to obtain a high-qualityfabric even if the yarn is used for either the warp or the weft withoutbeing used for both warp and weft. The thusly obtained woven or knittedfabric is superior to the conventional woven or knitted fabrics indispersability of fibrils, density of raised fibers and evenness ofraised fibers.

By comparison between FIG. 5, a photograph of the surface of the fabricobtained in Example 1 of the present invention, and FIG. 6, a photographof the surface of the fabric obtained in Comparative Example 1 of theconventional art, it is known that the fabric of the present inventionhas a superior quality because it has a higher density of raised fibersthan a conventional fabric.

In the present invention, various physical properties andcharacteristics of yarns and woven or knitted fabrics are evaluated bythe following method.

Rupture Elongation (%) and Rupture Strength (g/d)

The rupture elongation and the rupture strength are measured usingInstron Model 4201 according to ASTM D 2556 method Under a standardcondition (20° C.×65% RH).

Shrinkage Rate at Boiling Water (%)

The shrinkage rate at boiling water is measured according to JIS-L1037-5-12.

Evenness (U %)

Using a Uster Evenness Tester, type C, measurement is carried out forone minute under the condition: a yarn speed of 25 m/min, a gauge rangeof ±12.5% and a chart speed of 5 cm/min. Then, the evenness (U %) isevaluated.

Rate of Increment of Strength of Textured Yarn with Different Shrinkageafter Weight Reduction with Respect to Strength Prior to WeightReduction

The rupture strength (X) of the textured yarn with different shrinkageprior to weight reduction and the rupture strength (Y) of the texturedyarn with different shrinkage after weight reduction in a NaOH solutionof 1% at 95° C. are respectively measured. Then, the measured values aresubstituted into the following formula for calculation. $\begin{matrix}{{Rate}\quad{of}\quad{increment}\quad{of}\quad{strength}\quad{of}\quad{textured}} \\{{yarn}\quad{with}\quad{different}\quad{{shrinkage}(\%)}}\end{matrix} = {\frac{\left( {Y\text{-}X} \right)}{X} \times 100}$

Length and Number of Loops

Measuring is carried out by Fray Counter Model DT-104 (manufactured byToray Industries, Inc.) for one minute at a speed of 60 m/min as statedin International Fiber Journal, December 1993, pp. 5-10. Specifically,the number (X) of loops of at least 1.0 mm in maximum height(hereinafter, ‘loop length’) projecting from the surface of the texturedyarn is measured by the above mentioned measuring instrument, and thenthe number (Y) of loops of at least 2.5 mm in loop length is measured bythe above measuring instrument. The measured values are substituted inthe following formula and the ratio of loops of 1.0 to 2.5 mm in lengthis obtained with respect to the loops of at least 1.0 m in length.$\begin{matrix}{{Ratio}\quad(\%)\quad{of}\quad{loops}\quad{of}\quad 1.0\quad{to}\quad 2.5{mm}\quad{in}} \\{{{length}/{loops}}\quad{of}\quad{at}\quad{least}\quad 1.0{mm}\quad{in}\quad{length}}\end{matrix} = {\frac{X\text{-}Y}{X} \times 100}$

As for a mechanism for measuring a length of loops, using a yarn guideequipped with a micrometer, the textured yarn with different shrinkageis traveled in a constant direction and light is passed at a right angleto in the traveling direction. When the shades of loops higher than aset value appear on a screen board, the current flowing in an opticaltransistor bonded to the back of a pin hole is amplified to an electricsignal. Thus, the number of loops is measured by being automaticallycounted by a counter.

Drape Property/Softness/Evenness of Raised Fibers/Mélange Effect

An organoleptic test is conducted by 10 panelists. A five-point methodis carried out where the average point more than 4 is excellent, theaverage point between 3.9 and 3.0 is good and the point less than 2.9 isbad.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of preferredembodiments of the present invention will be more fully described in thefollowing detailed description, taken accompanying drawings. In thedrawings:

FIG. 1 is a schematic view of an air-texturing process according to thepresent invention;

FIG. 2 is a schematic view of a conventional false-twist texturingprocess;

FIG. 3 is an electron micrograph of a textured yarn (ATY) with differentshrinkage according to the present invention;

FIG. 4 is an electron micrograph of a conventional intermingled yarn(ITY) with different shrinkage;

FIG. 5 is an electron micrograph of the surface of a fabric woven fromthe textured yarn (ATY) with different shrinkage according to thepresent invention;

FIG. 6 is an electron micrograph of the surface of a fabric woven fromthe conventional intermingled yarn (ITY) with different shrinkage;

FIG. 7 is an electron micrograph of the textured yarn (ATY) withdifferent shrinkage after weight reduction according to the presentinvention;

FIG. 8 is a strength curve of the textured yarn (ATY) with differentshrinkage of the present invention according to an overfeed rate; and

FIG. 9 is a strength curve of the textured yarn (ATY) with differentshrinkage of the present invention according to a weight reduction rate.

※ Explanation of reference numerals for main parts in drawings.

A: low shrinkage, two-component composite yarn (effect yarn)

B: thermoplastic multifilament yarn (core yarn)

C: highly-orientated, undrawn two-component composite yarn (effect yarn)

D: High shrinkage yarn (core yarn)

a: loop portion of textured yarn with different shrinkage of the presentinvention

b: compact portion of conventional intermingled yarn (ITY) withdifferent shrinkage

c: bulky portion of conventional intermingled yarn (ITY) with differentshrinkage 1, 10: first feed roller 2, 13: second feed roller 3, 14: airtexturing nozzle 4: water supply device 5, 15: third feed roller 6:hollow heater 7: fourth feed roller 8, 16: take-up roller 11: hot plat12: false-twisting unit

BEST MODES FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail withreference to Examples and Comparative Examples. But, the presentinvention is not limited to the following Examples.

EXAMPLE 1

As a fiber forming component, polyethylene terephthalate with anintrinsic viscosity of 0.66 is used and, as a soluble component,copolymerized polyester with an intrinsic viscosity of 0.58 is usedwhich is obtained by copolymerizing polyethylene terephthalate withsulfo isophthalic acid of 2.5 mol % and polyethylene glycol of 10 weight%. The two kinds of polymers are respectively melted, spun at a spinningtemperature of 290° C. and at a spinning speed of 1,200 m/min using aconjugated spinneret pack, and then drawn by a common method at adrawing ratio of 3.3 times, thereby preparing a two-component compositeyarn of 120 deniers/48 filaments with a shrinkage rate at boiling waterof 8%. Meanwhile, copolymerized polyethylene terephthalate with anintrinsic viscosity of 0.66, which is prepared by copolymerizingpolyethylene terephthalate with a third copolymer component, that is,isophthalic acid of 10 mol %, is melted at 280° C., spun at a spinningspeed of 1,450 m/min, and then drawn 2.9 times at 90° C., therebypreparing a thermoplastic multifilament yarn of 30 deniers/12 filamentswith a shrinkage rate at boiling water of 23%. The thusly preparedtwo-component composite yarn is fed as an effect yarn into an airtexturing nozzle (Hebrain T-311) at an overfeed rate of 38% and at thesame the thusly prepared thermoplastic multifilament yarn is fed as acore yarn into the air texturing nozzle at an overfeed rate of 16%. Theyare air-textured by an air pressure of 12 kgf/cm², thermally set in ahollow heater 6 at 180° C. in a state that the overfeed rate is −3%, andthen wound under the condition that the overfeed rate is −8%, therebypreparing a textured yarn (ATY) with different shrinkage. An 8-sheetsatin weave fabric is woven using the textured yarn (ATY) as a weft andthereafter scoured, alkali weight-reduced, dyed, heat-set, raised andbuffed under a common condition, thereby preparing a suede woven fabric.The evaluation results of the physical properties of the textured yarn(ATY) with different shrinkage and woven fabric thus obtained are statedas in Table 2.

EXAMPLES 2 TO 5

A textured yarn (ATY) with different shrinkage and a suede woven fabricare prepared by the same procedure as in Example 1 except that thecopolymer content of isophthalic acid, the shrinkage rate at boilingwater of the core yarn, the overfeed rate of the core yarn and theoverfeed rate of the effect yarn are changed as in Table 1. Theevaluation results of the physical properties of the textured yarn (ATY)with different shrinkage and woven fabric thus obtained are stated as inTable 2. TABLE 1 Condition of Preparation Copolymer Shrinkage content(mol %) rate (%) at Overfeed rate (%) of isophthalic boiling water ofAir pressure Core Effect Classification acid core yarn (kgf/cm²) yarnyarn Example 1 10 23 12 16 38 Example 2  0  8 12 16 38 Example 3 12 3012 16 38 Example 4 10 23 10 10 22 Example 5 10 23 14 35 55

EXAMPLE 6

As a fiber forming component, polyethylene terephthalate with anintrinsic viscosity of 0.66 is used and, as a soluble component,copolymer polyester with an intrinsic viscosity of 0.58 is used which isobtained by copolymerizing polyethylene terephthalate with sulfoisophthalic acid of 2.5 mol % and polyethylene glycol of 10 weight %.The two kinds of polymers are respectively melted, spun at a spinningtemperature of 290° C. and at a spinning speed of 3,200 m/min using aconjugated spinneret pack, thereby preparing a highly-oriented, undrawnyarn of 200 deniers/48 filaments. Thereafter, the prepared yarn is drawnby a common method in a complex false twister (hot plate: 150° C.) ofFIG. 2, thereby preparing a false-twist yarn of 120 deniers/48 filamentswith a shrinkage rate at boiling water of 6%. Meanwhile, copolymerizedpolyethylene terephthalate with an intrinsic viscosity of 0.66, which isprepared by copolymerizing polyethylene terephthalate with the thirdcopolymer component, that is, isophthalic acid of 10 mol %, is melted at280° C., spun at a spinning speed of 1,450 m/min, and then drawn 2.9times at 90° C., thereby preparing a thermoplastic multifilament yarn of30 deniers/12 filaments with a shrinkage rate at boiling water of 23%.Then, the false-twist yarn and thermoplastic multifilament yarn thusobtained are air-textured by the same procedure and under the samecondition as in Example 1, thereby preparing a textured yarn (ATY) withdifferent shrinkage. An 8-sheet satin weave fabric is woven using thetextured yarn (ATY) as a weft and thereafter scoured, alkaliweight-reduced, dyed, heat-set, raised and buffed under a commoncondition, thereby preparing a suede woven fabric. The evaluationresults of the physical properties of the textured yarn (ATY) withdifferent shrinkage and woven fabric thus obtained are stated as inTable 2.

EXAMPLE 7

As a fiber forming component, polyethylene terephthalate with anintrinsic viscosity of 0.66 is used and, as a soluble component,copolymer polyester with an intrinsic viscosity of 0.58 is used which isobtained by copolymerizing polyethylene terephthalate with sulfoisophthalic acid of 2.5 mol % and polyethylene glycol of 10 weight %.The two kinds of polymers are respectively melted, spun at a spinningtemperature of 290° C. and at a spinning speed of 1,200 m/min using aconjugated spinneret pack, and then drawn by a common method at adrawing ratio of 3.3 times, thereby preparing a two-component compositeyarn of 120 deniers/48 filaments with a shrinkage rate at boiling waterof 8%. Meanwhile, as a fiber forming component, polyamide with arelative viscosity of 2.50 is used and, as a soluble component,copolymerized polyester with an intrinsic viscosity of 0.58 is usedwhich is obtained by copolymerizing polyethylene terephthalate withsulfo isophthalic acid of 2.5 mol % and polyethylene glycol of 10 weight%. The two kinds of polymers are respectively melted, spun at a spinningtemperature of 280° C. and at a spinning speed of 1,200 m/min using aconjugated spinneret pack, and then drawn by a common method at adrawing ratio of 3.3 times, thereby preparing a two-component compositeyarn of 120 deniers/48 filaments with a shrinkage rate at boiling waterof 6%. Meanwhile, copolymerized polyethylene terephthalate with anintrinsic viscosity of 0.66, which is prepared by copolymerizingpolyethylene terephthalate with a third copolymer component, that is,isophthalic acid of 10 mol %, is melted at 280° C., spun at a spinningspeed of 1,450 m/min, and then drawn 2.9 times at 90° C., therebypreparing a thermoplastic multifilament yarn of 30 deniers/12 filamentswith a shrinkage rate at boiling water of 23%. The two kinds oftwo-component composite yarns thus obtained are simultaneously fed as aneffect yarn into an air texturing nozzle (Hebrain T-311) at an overfeedrate of 38% and at the same the thusly prepared thermoplasticmultifilament yarn is fed as a core yarn into the air texturing nozzleat an overfeed rate of 16%. They are air-textured by an air pressure of12 kgf/cm² and thermally set in a hollow heater 6 at 180° C. in a statethat the overfeed rate is −4%, and then wound under the condition thatthe overfeed rate is −7%, thereby preparing a textured yarn (ATY) withdifferent shrinkage. An 8-sheet satin weave fabric is woven using thetextured yarn (ATY) as a weft and thereafter scoured, alkaliweight-reduced, dyed, heat-set, raised and buffed under a commoncondition, thereby preparing a suede woven fabric. The evaluationresults of the physical properties of the textured yarn (ATY) withdifferent shrinkage and woven fabric thus obtained are stated as inTable 2.

EXAMPLE 8

As a fiber forming component, polyethylene terephthalate with anintrinsic viscosity of 0.66 and polyamide with a relative viscosity of2.50 are used. The two kinds of polymers are respectively melted, spunat a spinning temperature of 290° C. and at a spinning speed of 1,200m/min using a conjugated spinneret pack, and then drawn by a commonmethod at a drawing ratio of 3.0 times, thereby preparing atwo-component composite yarn of 120 deniers/48 filaments with ashrinkage rate at boiling water of 6%. Meanwhile, polyethyleneterephthalate with an intrinsic viscosity of 0.66 is melted at 290° C.,spun at a spinning speed of 1,450 m/min, and then drawn 2.9 times at110° C., thereby preparing a thermoplastic multifilament yarn of 30deniers/12 filaments with a shrinkage rate at boiling water of 7%. Then,the thus obtained two-component composite yarn used as an effect yarnand the thus obtained thermoplastic multifilament yarn used as a coreyarn are air-textured by the same procedure and under the same conditionas in Example 1, thereby preparing a textured yarn (ATY) with differentshrinkage. An 8-sheet satin weave fabric is woven using the texturedyarn (ATY) as a weft and thereafter scoured, alkali weight-reduced,dyed, heat-set, raised and buffed under a common condition, therebypreparing a suede woven fabric. The evaluation results of the physicalproperties of the textured yarn (ATY) with different shrinkage and wovenfabric thus obtained are stated as in Table 2.

COMPARATIVE EXAMPLE 1

As a fiber forming component, polyethylene terephthalate with anintrinsic viscosity of 0.66 is used and, as a soluble component,copolymerized polyester with an intrinsic viscosity of 0.58 is usedwhich is obtained by copolymerizing polyethylene terephthalate withsulfo isophthalic acid of 2.5 mol % and polyethylene glycol of 10 weight%. The two kinds of polymers are respectively melted, spun at a spinningtemperature of 290° C. and at a spinning speed of 3,200 m/min using aconjugated spinneret pack, thereby preparing a highly-oriented, undrawnyarn of 200 deniers/48 filaments. Thereafter, the prepared yarn is falsetwisted by a common method in a complex false twister (hot plate: 150°C.) of FIG. 2, thereby preparing a false-twist yarn of 120 deniers/48filaments with a shrinkage rate at boiling water of 6%. Meanwhile,copolymerized polyethylene terephthalate with an intrinsic viscosity of0.66, which is prepared by copolymerizing polyethylene terephthalatewith a third copolymer component, that is, isophthalic acid of 10 mol %,is melted at 280° C., spun at a spinning speed of 1,450 m/min, and thendrawn 2.9 times at 90° C., thereby preparing a thermoplasticmultifilament yarn of 30 deniers/12 filaments with a shrinkage rate atboiling water of 23%. Then, the false-twist yarn and thermoplasticmultifilament yarn thus obtained are interlaced (intermingled) in thecomplex false twister under the condition that the overfeed rate is 2.5%and the air pressure is 3.5 kgf/cm², thereby preparing an intermingledyarn (ITY) with different shrinkage. An 8-sheet satin weave fabric iswoven using the intermingled yarn (ITY) as a weft and thereafterscoured, alkali weight-reduced, dyed, heat-set, raised and buffed undera common condition, thereby preparing a suede woven fabric. Theevaluation results of the physical properties of the intermingled yarn(ITY) with different shrinkage and woven fabric thus obtained are statedas in Table 2.

COMPARATIVE EXAMPLE 2

As a fiber forming component, polyethylene terephthalate with anintrinsic viscosity of 0.66 is used and, as a soluble component,copolymerized polyester with an intrinsic viscosity of 0.58 is usedwhich is obtained by copolymerizing polyethylene terephthalate withsulfo isophthalic acid of 2.5 mol % and polyethylene glycol of 10 weight%. The two kinds of polymers are respectively melted, spun at a spinningtemperature of 290° C. and at a spinning speed of 1,200 m/min using aconjugated spinneret pack, and then drawn by a common method at adrawing ratio of 3.3 times, thereby preparing a two-component compositeyarn of 120 deniers/48 filaments with a shrinkage rate at boiling waterof 6%. Meanwhile, copolymerized polyethylene terephthalate with anintrinsic viscosity of 0.66, which is prepared by copolymerizingpolyethylene terephthalate with a third copolymer component, that is,isophthalic acid of 10 mol %, is melted at 280° C., spun at a spinningspeed of 1,450 m/min, and then drawn 2.9 times at 90° C., therebypreparing a thermoplastic multifilament yarn of 30 deniers/12 filamentswith a shrinkage rate at boiling water of 23%. The thusly preparedtwo-component composite yarn is fed as an effect yarn into an airtexturing nozzle at an overfeed rate of 3% and at the same the thuslyprepared thermoplastic multifilament yarn is fed as a core yarn into theair texturing nozzle at an overfeed rate of 3%. They are interlaced(intermingled) by an air pressure of 3.5 kgf/cm², thereby preparing anintermingled yarn (ITY) with different shrinkage. An 8-sheet satin weavefabric is woven using the intermingled yarn (ITY) as a weft andthereafter scoured, alkali weight-reduced, dyed, heat-set, raised andbuffed under a common condition, thereby preparing a suede woven fabric.The evaluation results of the physical properties of the intermingledyarn (ITY) with different shrinkage and woven fabric thus obtained arestated as in Table 2.

COMPARATIVE EXAMPLE 3

Copolymerized polyethylene terephthalate with an intrinsic viscosity of0.66, which is prepared by copolymerizing polyethylene terephthalatewith a third copolymer component, that is, isophthalic acid of 10 mol %,is melted at 280° C., spun at a spinning speed of 1,450 m/min, and thendrawn 2.9 times at 90° C., thereby preparing a thermoplasticmultifilament yarn of 30 deniers/12 filaments with a shrinkage rate atboiling water of 23%. The thusly prepared thermoplastic multifilamentyarn is fed as a core yarn into an air texturing nozzle (Hebrain T-311)at an overfeed rate of 16% and at the same a polyester multifilamentyarn of 120 deniers/48 filaments with a shrinkage rate at boiling waterof 8% is fed as an effect yarn into the air texturing nozzle at anoverfeed rate of 30%. They are air-textured by an air pressure of 10kgf/cm², thereby preparing a textured yarn (ATY) with differentshrinkage. An 8-sheet satin weave fabric is woven using the texturedyarn (ATY) as a weft and thereafter scoured, alkali weight-reduced,dyed, heat-set, raised and buffed under a common condition, therebypreparing a suede woven fabric. The evaluation results of the physicalproperties of the textured yarn (ATY) with different shrinkage and wovenfabric thus obtained are stated as in Table 2. TABLE 2 Physicalproperties of textured yarn and fabric Comparative Example ExampleClassification 1 2 3 4 5 6 7 8 1 2 3 Physical Number of loops 112 109111 65 256 72 162 125 0 0 87 properties between 1.0 of textured and 2.5mm yarn with Number of loops 1 0 1 0 9 0 4 0 0 0 5 different higher than2.5 mm shrinkage Rate (time) of 36 36 36 36 36 36 36 36 — — 3 Incrementof surface loops after weight reduction Strength (g/d) 1.8 2.6 3.2 2.61.6 2.4 1.8 2.6 2.8 3.8 3.6 Before weight reduction Strength (g/d) 2.02.9 3.4 3.1 1.9 3.0 2.0 2.9 2.7 3.7 3.6 After weight reduction U % 0.610.72 0.85 0.71 0.92 0.57 0.80 0.72 0.63 0.45 0.42 Physical DrapeExcellent Good Excellent Good Excellent Excellent Excellent ExcellentBad Bad Bad properties property of fabric Softness Excellent ExcellentExcellent Good Excellent Excellent Excellent Excellent Bad Bad BadEvenness of Excellent Good Excellent Excellent Good Excellent ExcellentExcellent Bad Bad Bad raised fibers Mélange effect Bad Bad Bad Bad BadBad Excellent Excellent Bad Bad Bad

INDUSTRIAL APPLICABILITY

The textured yarn (ATY) with different shrinkage of the presentinvention exhibits a good touch and appearance since the monofilamentdispersability of the two-component composite yarn is superior, thedensity of the raised fibers is high and the length of the raised fibersis uniform in the production of woven or knitted fabrics. Thus, thetextured yarn (ATY) with different shrinkage is useful as yarns forapparel. Additionally, the method for preparing the textured yarn (ATY)with different shrinkage of the present invention is simplified in itsprocedure and is improved in processibility since a process forfalse-twisting the two-component composite yarn can be omitted.

1. A textured yarn (ATY) with different shrinkage and excellent suedeeffect, wherein at least one or two kinds of two-component compositeyarn (effect yarn) having a monofilament fineness of 0.001 to 0.3 denierafter dividing or extracting an extraction component are twined around athermoplastic multifilament yarn (core yarn), 2 to 350 loops per meterof the two-component composite yarn of at least 1.0 mm in length areformed on the surface of the textured yarn, and more than 95% of thetwo-component composite yarn loops of at least 1.0 mm in length has alength of 1.0 to 2.5 mm.
 2. The textured yarn of claim 1, wherein theshrinkage rate at boiling water of the two-component composite yarn(effect yarn) is 0 to 15%.
 3. The textured yarn of claim 1, wherein theshrinkage rate at boiling water of the thermoplastic multifilament yarn(core yarn) is 5 to 50%.
 4. The textured yarn of claim 1, wherein 2 to50 loops per meter of the two-component composite yarn of at least 1.0mm in length are formed on the surface of the textured yarn.
 5. Thetextured yarn of claim 1, wherein the monofilament fineness of thethermoplastic multifilament yarn (core yarn) 1 to 8 denier.
 6. Thetextured yarn of claim 1, wherein the two-component composite yarn(effect yarn) consists of at least two kinds of fiber forming componentswith different dyeing properties.
 7. The textured yarn of claim 1 or 6,wherein the two-component composite yarn (effect yarn) consists of afiber forming component of polyester and a fiber forming component ofpolyamide.
 8. The textured yarn of claim 1, wherein the two-componentcomposite yarn (effect yarn) consists of a fiber forming component andan extraction component.
 9. The textured yarn of claim 1 or 8, whereinthe fiber forming component and extraction component in thetwo-component composite yarn (effect yarn) are conjugated into asea-island type or division type.
 10. The textured yarn of claim 1,wherein the effect yarn comprises at least two kinds of two-componentcomposite yarns, each consisting of a fiber forming component and anextraction component, the fiber forming component having differentdyeing properties from each other.
 11. The textured yarn of claim 1 or10, wherein the effect yarn comprises: (i) a two-component compositeyarn consisting of a polyester fiber forming component and an extractioncomponent; and (ii) a two-component composite yarn consisting of apolyamide fiber forming component and an extraction component.
 12. Thetextured yarn of claim 1, wherein the strength of the textured yarn(ATY) with different shrinkage is 1.5 to 3.5 g/denier.
 13. The texturedyarn of claim 1, wherein the evenness (U %) of the textured yarn (ATY)with different shrinkage is 0.5 to 1.0.
 14. The textured yarn of claim1, wherein the strength of the textured yarn (ATY) with differentshrinkage after dividing or extracting the extraction component isincreased by 5 to 30% with respect to the strength prior to dividing orextracting then extraction component.
 15. The textured yarn of claim 1,wherein the number of loops on the surface of the textured yarn (ATY)with different shrinkage is increased 8 to 170 times with respect to thenumber prior to dividing or extracting then extraction component.
 16. Amethod for preparing a textured yarn (ATY) with different shrinkage andexcellent suede effect by air-texturing an effect yarn and core yarn,wherein at least one or two kinds of two-component composite yarn (A) isfed as the effect yarn into an air texturing nozzle (3) at an over feedrate of 10 to 60% through the first feed roller (1), the two-componentcomposite yarn (A) consisting of a fiber forming component and anextraction component or consisting of at least two kinds of fiberforming components and having a monofilament fineness of 0.001 to 0.3denier after dividing or extracting the extraction component, at thesame time, a thermoplastic multifilament yarn (B) is fed as the coreyarn into the air texturing nozzle (3) at an overfed rate of 5 to 55%through the second feed roller (2) while supplying water to a watersupply device (4) disposed between the second feed roller (2) and theair texturing nozzle (3), and then the effect and core yarns areair-textured by an air pressure of 6 to 16 kgf/cm² in the air texturingnozzle (3), heat-treated at a temperature of 130 to 210° C. in a hollowheater (6) in a state that the overfeed rate is 0 to −8% and wound in astate that the overfeed rate is −2 to −12%.
 17. The method of claim 16,wherein the elongation of the core yarn is 25 to 45%.
 18. The method ofclaim 16, wherein the elongation of the effect yarn is 23 to 45%. 19.The method of claim 16, wherein the two-component composite yarn (effectyarn) consists of at least two kinds of fiber forming components havingdifferent dyeing properties from each other.
 20. The method of claim 16or 19, wherein the two-component composite yarn (effect yarn) consistsof a polyester fiber forming component and a polyamide fiber formingcomponent.
 21. The method of claim 16, wherein the two-componentcomposite yarn (effect yarn) consists of a fiber forming component andan extraction component.
 22. The method of claim 16, wherein the effectyarn includes at least two kinds of two-component composite yarns, eachconsisting of a fiber forming component and an extraction component, thefiber forming component having different dyeing properties from eachother.
 23. The method of claim 16 or 22, wherein the effect yarncomprises: (i) at least one two-component composite yarn consisting of apolyester fiber forming component and an extraction component; and (ii)at least one two-component composite yarn consisting of a polyamidefiber forming component and an extraction component.
 24. The method ofclaim 16, wherein the rotary linear velocity of the first feed roller(1) and second feed roller (2) is 200 to 600 m/min.
 25. The method ofclaim 16, wherein the water supplied to the core yarn by the watersupply device (4) is deionized.
 26. A woven fabric woven from thetextured yarn with different shrinkage of claim
 1. 27. A circular knitfabric knitted from the textured yarn with different shrinkage ofclaim
 1. 28. A warp knit fabric knitted from the textured yarn withdifferent shrinkage of claim 1.